Parser::parseXslCopyOf() - Code Metrics - Inspection of "WiP" - s9e/TextFormatter - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Branch — TemplateParserRefactor (06d644)

by Josh

created 2018-02-15 14:09 UTC

Parser::parseXslCopyOf() B

↳ Parent: Parser

Complexity

Conditions	3
Paths	3

Size

Total Lines	32
Code Lines	14

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	32
rs	8.8571
c	0
b	0
f	0
cc	3
eloc	14
nc	3
nop	2

<?php

/**
* @package   s9e\TextFormatter
* @copyright Copyright (c) 2010-2018 The s9e Authors
* @license   http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace s9e\TextFormatter\Configurator\Helpers\TemplateParser;

use DOMDocument;
use DOMElement;
use DOMXPath;
use RuntimeException;
use s9e\TextFormatter\Configurator\Helpers\AVTHelper;

class Parser extends IRProcessor
{
	/**
	* @var Normalizer
	*/
	protected $normalizer;

	/**
	* @param  Normalizer $normalizer
	* @return void
	*/
	public function __construct(Normalizer $normalizer)
	{
		$this->normalizer = $normalizer;
	}

	/**
	* Parse a template into an internal representation
	*
	* @param  string      $template Source template
	* @return DOMDocument           Internal representation
	*/
	public function parse($template)
	{
		$xsl = '<xsl:template xmlns:xsl="' . self::XMLNS_XSL . '">' . $template . '</xsl:template>';

		$dom = new DOMDocument;
		$dom->loadXML($xsl);

		$ir = new DOMDocument;
		$ir->loadXML('<template/>');

		$this->createXPath($dom);
		$this->parseChildren($ir->documentElement, $dom->documentElement);
		$this->normalizer->normalize($ir);

		return $ir;
	}

	/**
	* Append an <output/> element to given node in the IR
	*
	* @param  DOMElement $ir      Parent node
	* @param  string     $type    Either 'avt', 'literal' or 'xpath'
	* @param  string     $content Content to output
	* @return void
	*/
	protected function appendOutput(DOMElement $ir, $type, $content)
	{
		// Reparse AVTs and add them as separate xpath/literal outputs
		if ($type === 'avt')
		{
			foreach (AVTHelper::parse($content) as $token)
			{
				$type = ($token[0] === 'expression') ? 'xpath' : 'literal';
				$this->appendOutput($ir, $type, $token[1]);
			}

			return;
		}

		if ($type === 'xpath')
		{
			// Remove whitespace surrounding XPath expressions
			$content = trim($content);
		}

		if ($type === 'literal' && $content === '')
		{
			// Don't add empty literals
			return;
		}

		$this->appendElement($ir, 'output', htmlspecialchars($content))
			->setAttribute('type', $type);
	}

	/**
	* Parse all the children of a given element
	*
	* @param  DOMElement $ir     Node in the internal representation that represents the parent node
	* @param  DOMElement $parent Parent node
	* @return void
	*/
	protected function parseChildren(DOMElement $ir, DOMElement $parent)
	{
		foreach ($parent->childNodes as $child)
		{
			switch ($child->nodeType)
			{
				case XML_COMMENT_NODE:
					// Do nothing
					break;

				case XML_TEXT_NODE:
					if (trim($child->textContent) !== '')
					{
						$this->appendOutput($ir, 'literal', $child->textContent);
					}
					break;

				case XML_ELEMENT_NODE:
					$this->parseNode($ir, $child);
					break;

				default:
					throw new RuntimeException("Cannot parse node '" . $child->nodeName . "''");
			}
		}
	}

	/**
	* Parse a given node into the internal representation
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node Node to parse
	* @return void
	*/
	protected function parseNode(DOMElement $ir, DOMElement $node)
	{
		// XSL elements are parsed by the corresponding parseXsl* method
		if ($node->namespaceURI === self::XMLNS_XSL)
		{
			$methodName = 'parseXsl' . str_replace(' ', '', ucwords(str_replace('-', ' ', $node->localName)));
			if (!method_exists($this, $methodName))
			{
				throw new RuntimeException("Element '" . $node->nodeName . "' is not supported");
			}

			return $this->$methodName($ir, $node);
		}

		// Create an <element/> with a name attribute equal to given node's name
		$element = $this->appendElement($ir, 'element');
		$element->setAttribute('name', $node->nodeName);

		// Append an <attribute/> element for each namespace declaration
		$xpath = new DOMXPath($node->ownerDocument);
		foreach ($xpath->query('namespace::*', $node) as $ns)
		{
			if ($node->hasAttribute($ns->nodeName))
			{
				$irAttribute = $this->appendElement($element, 'attribute');
				$irAttribute->setAttribute('name', $ns->nodeName);
				$this->appendOutput($irAttribute, 'literal', $ns->nodeValue);
			}
		}

		// Append an <attribute/> element for each of this node's attribute
		foreach ($node->attributes as $attribute)
		{
			$irAttribute = $this->appendElement($element, 'attribute');
			$irAttribute->setAttribute('name', $attribute->nodeName);

			// Append an <output/> element to represent the attribute's value
			$this->appendOutput($irAttribute, 'avt', $attribute->value);
		}

		// Parse the content of this node
		$this->parseChildren($element, $node);
	}

	/**
	* Parse an <xsl:apply-templates/> node into the internal representation
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node <xsl:apply-templates/> node
	* @return void
	*/
	protected function parseXslApplyTemplates(DOMElement $ir, DOMElement $node)
	{
		$applyTemplates = $this->appendElement($ir, 'applyTemplates');
		if ($node->hasAttribute('select'))
		{
			$applyTemplates->setAttribute('select', $node->getAttribute('select'));
		}
	}

	/**
	* Parse an <xsl:attribute/> node into the internal representation
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node <xsl:attribute/> node
	* @return void
	*/
	protected function parseXslAttribute(DOMElement $ir, DOMElement $node)
	{
		$attribute = $this->appendElement($ir, 'attribute');
		$attribute->setAttribute('name', $node->getAttribute('name'));
		$this->parseChildren($attribute, $node);
	}

	/**
	* Parse an <xsl:choose/> node and its <xsl:when/> and <xsl:otherwise/> children into the
	* internal representation
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node <xsl:choose/> node
	* @return void
	*/
	protected function parseXslChoose(DOMElement $ir, DOMElement $node)
	{
		$switch = $this->appendElement($ir, 'switch');
		foreach ($this->query('./xsl:when', $node) as $when)
		{
			// Create a <case/> element with the original test condition in @test
			$case = $this->appendElement($switch, 'case');
			$case->setAttribute('test', $when->getAttribute('test'));
			$this->parseChildren($case, $when);
		}

		// Add the default branch, which is presumed to be last
		foreach ($this->query('./xsl:otherwise', $node) as $otherwise)
		{
			$case = $this->appendElement($switch, 'case');
			$this->parseChildren($case, $otherwise);

			// There should be only one <xsl:otherwise/> but we'll break anyway
			break;
		}
	}

	/**
	* Parse an <xsl:comment/> node into the internal representation
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node <xsl:comment/> node
	* @return void
	*/
	protected function parseXslComment(DOMElement $ir, DOMElement $node)
	{
		$comment = $this->appendElement($ir, 'comment');

		// Parse this branch's content
		$this->parseChildren($comment, $node);
	}

	/**
	* Parse an <xsl:copy-of/> node into the internal representation
	*
	* NOTE: only attributes are supported
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node <xsl:copy-of/> node
	* @return void
	*/
	protected function parseXslCopyOf(DOMElement $ir, DOMElement $node)
	{
		$expr = $node->getAttribute('select');

		// <xsl:copy-of select="@foo"/>
		if (preg_match('#^@([-\\w]+)$#', $expr, $m))
		{
			// Create a switch element in the IR
			$switch = $this->appendElement($ir, 'switch');
			$case   = $this->appendElement($switch, 'case');
			$case->setAttribute('test', $expr);

			// Append an attribute element
			$attribute = $this->appendElement($case, 'attribute');
			$attribute->setAttribute('name', $m[1]);

			// Set the attribute's content, which is simply the copied attribute's value
			$this->appendOutput($attribute, 'xpath', $expr);

			return;
		}

		// <xsl:copy-of select="@*"/>
		if ($expr === '@*')
		{
			$this->appendElement($ir, 'copyOfAttributes');

			return;
		}

		throw new RuntimeException("Unsupported <xsl:copy-of/> expression '" . $expr . "'");
	}

	/**
	* Parse an <xsl:element/> node into the internal representation
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node <xsl:element/> node
	* @return void
	*/
	protected function parseXslElement(DOMElement $ir, DOMElement $node)
	{
		$elName = $node->getAttribute('name');

		if ($elName !== '')
		{
			$element = $this->appendElement($ir, 'element');

			// Copy this element's name
			$element->setAttribute('name', $elName);

			// Parse this element's content
			$this->parseChildren($element, $node);
		}
	}

	/**
	* Parse an <xsl:if/> node into the internal representation
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node <xsl:if/> node
	* @return void
	*/
	protected function parseXslIf(DOMElement $ir, DOMElement $node)
	{
		// An <xsl:if/> is represented by a <switch/> with only one <case/>
		$switch = $this->appendElement($ir, 'switch');
		$case   = $this->appendElement($switch, 'case');
		$case->setAttribute('test', $node->getAttribute('test'));

		// Parse this branch's content
		$this->parseChildren($case, $node);
	}

	/**
	* Parse an <xsl:text/> node into the internal representation
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node <xsl:text/> node
	* @return void
	*/
	protected function parseXslText(DOMElement $ir, DOMElement $node)
	{
		$this->appendOutput($ir, 'literal', $node->textContent);
		if ($node->getAttribute('disable-output-escaping') === 'yes')
		{
			$ir->lastChild->setAttribute('disable-output-escaping', 'yes');
		}
	}

	/**
	* Parse an <xsl:value-of/> node into the internal representation
	*
	* @param  DOMElement $ir   Node in the internal representation that represents the node's parent
	* @param  DOMElement $node <xsl:value-of/> node
	* @return void
	*/
	protected function parseXslValueOf(DOMElement $ir, DOMElement $node)
	{
		$this->appendOutput($ir, 'xpath', $node->getAttribute('select'));
		if ($node->getAttribute('disable-output-escaping') === 'yes')
		{
			$ir->lastChild->setAttribute('disable-output-escaping', 'yes');
		}
	}
}

1			<?php
2
3			/**
4			* @package s9e\TextFormatter
5			* @copyright Copyright (c) 2010-2018 The s9e Authors
6			* @license http://www.opensource.org/licenses/mit-license.php The MIT License
7			*/
8			namespace s9e\TextFormatter\Configurator\Helpers\TemplateParser;
9
10			use DOMDocument;
11			use DOMElement;
12			use DOMXPath;
13			use RuntimeException;
14			use s9e\TextFormatter\Configurator\Helpers\AVTHelper;
15
16			class Parser extends IRProcessor
17			{
18			/**
19			* @var Normalizer
20			*/
21			protected $normalizer;
22
23			/**
24			* @param Normalizer $normalizer
25			* @return void
26			*/
27			public function __construct(Normalizer $normalizer)
28			{
29			$this->normalizer = $normalizer;
30			}
31
32			/**
33			* Parse a template into an internal representation
34			*
35			* @param string $template Source template
36			* @return DOMDocument Internal representation
37			*/
38			public function parse($template)
39			{
40			$xsl = '<xsl:template xmlns:xsl="' . self::XMLNS_XSL . '">' . $template . '</xsl:template>';
41
42			$dom = new DOMDocument;
43			$dom->loadXML($xsl);
44
45			$ir = new DOMDocument;
46			$ir->loadXML('<template/>');
47
48			$this->createXPath($dom);
49			$this->parseChildren($ir->documentElement, $dom->documentElement);
50			$this->normalizer->normalize($ir);
51
52			return $ir;
53			}
54
55			/**
56			* Append an <output/> element to given node in the IR
57			*
58			* @param DOMElement $ir Parent node
59			* @param string $type Either 'avt', 'literal' or 'xpath'
60			* @param string $content Content to output
61			* @return void
62			*/
63			protected function appendOutput(DOMElement $ir, $type, $content)
64			{
65			// Reparse AVTs and add them as separate xpath/literal outputs
66			if ($type === 'avt')
67			{
68			foreach (AVTHelper::parse($content) as $token)
69			{
70			$type = ($token[0] === 'expression') ? 'xpath' : 'literal';
71			$this->appendOutput($ir, $type, $token[1]);
72			}
73
74			return;
75			}
76
77			if ($type === 'xpath')
78			{
79			// Remove whitespace surrounding XPath expressions
80			$content = trim($content);
81			}
82
83			if ($type === 'literal' && $content === '')
84			{
85			// Don't add empty literals
86			return;
87			}
88
89			$this->appendElement($ir, 'output', htmlspecialchars($content))
90			->setAttribute('type', $type);
91			}
92
93			/**
94			* Parse all the children of a given element
95			*
96			* @param DOMElement $ir Node in the internal representation that represents the parent node
97			* @param DOMElement $parent Parent node
98			* @return void
99			*/
100			protected function parseChildren(DOMElement $ir, DOMElement $parent)
101			{
102			foreach ($parent->childNodes as $child)
103			{
104			switch ($child->nodeType)
105			{
106			case XML_COMMENT_NODE:
107			// Do nothing
108			break;
109
110			case XML_TEXT_NODE:
111			if (trim($child->textContent) !== '')
112			{
113			$this->appendOutput($ir, 'literal', $child->textContent);
114			}
115			break;
116
117			case XML_ELEMENT_NODE:
118			$this->parseNode($ir, $child);
119			break;
120
121			default:
122			throw new RuntimeException("Cannot parse node '" . $child->nodeName . "''");
123			}
124			}
125			}
126
127			/**
128			* Parse a given node into the internal representation
129			*
130			* @param DOMElement $ir Node in the internal representation that represents the node's parent
131			* @param DOMElement $node Node to parse
132			* @return void
133			*/
134			protected function parseNode(DOMElement $ir, DOMElement $node)
135			{
136			// XSL elements are parsed by the corresponding parseXsl* method
137			if ($node->namespaceURI === self::XMLNS_XSL)
138			{
139			$methodName = 'parseXsl' . str_replace(' ', '', ucwords(str_replace('-', ' ', $node->localName)));
140			if (!method_exists($this, $methodName))
141			{
142			throw new RuntimeException("Element '" . $node->nodeName . "' is not supported");
143			}
144
145			return $this->$methodName($ir, $node);
146			}
147
148			// Create an <element/> with a name attribute equal to given node's name
149			$element = $this->appendElement($ir, 'element');
150			$element->setAttribute('name', $node->nodeName);
151
152			// Append an <attribute/> element for each namespace declaration
153			$xpath = new DOMXPath($node->ownerDocument);
154			foreach ($xpath->query('namespace::*', $node) as $ns)
155			{
156			if ($node->hasAttribute($ns->nodeName))
157			{
158			$irAttribute = $this->appendElement($element, 'attribute');
159			$irAttribute->setAttribute('name', $ns->nodeName);
160			$this->appendOutput($irAttribute, 'literal', $ns->nodeValue);
161			}
162			}
163
164			// Append an <attribute/> element for each of this node's attribute
165			foreach ($node->attributes as $attribute)
166			{
167			$irAttribute = $this->appendElement($element, 'attribute');
168			$irAttribute->setAttribute('name', $attribute->nodeName);
169
170			// Append an <output/> element to represent the attribute's value
171			$this->appendOutput($irAttribute, 'avt', $attribute->value);
172			}
173
174			// Parse the content of this node
175			$this->parseChildren($element, $node);
176			}
177
178			/**
179			* Parse an <xsl:apply-templates/> node into the internal representation
180			*
181			* @param DOMElement $ir Node in the internal representation that represents the node's parent
182			* @param DOMElement $node <xsl:apply-templates/> node
183			* @return void
184			*/
185			protected function parseXslApplyTemplates(DOMElement $ir, DOMElement $node)
186			{
187			$applyTemplates = $this->appendElement($ir, 'applyTemplates');
188			if ($node->hasAttribute('select'))
189			{
190			$applyTemplates->setAttribute('select', $node->getAttribute('select'));
191			}
192			}
193
194			/**
195			* Parse an <xsl:attribute/> node into the internal representation
196			*
197			* @param DOMElement $ir Node in the internal representation that represents the node's parent
198			* @param DOMElement $node <xsl:attribute/> node
199			* @return void
200			*/
201			protected function parseXslAttribute(DOMElement $ir, DOMElement $node)
202			{
203			$attribute = $this->appendElement($ir, 'attribute');
204			$attribute->setAttribute('name', $node->getAttribute('name'));
205			$this->parseChildren($attribute, $node);
206			}
207
208			/**
209			* Parse an <xsl:choose/> node and its <xsl:when/> and <xsl:otherwise/> children into the
210			* internal representation
211			*
212			* @param DOMElement $ir Node in the internal representation that represents the node's parent
213			* @param DOMElement $node <xsl:choose/> node
214			* @return void
215			*/
216			protected function parseXslChoose(DOMElement $ir, DOMElement $node)
217			{
218			$switch = $this->appendElement($ir, 'switch');
219			foreach ($this->query('./xsl:when', $node) as $when)
220			{
221			// Create a <case/> element with the original test condition in @test
222			$case = $this->appendElement($switch, 'case');
223			$case->setAttribute('test', $when->getAttribute('test'));
224			$this->parseChildren($case, $when);
225			}
226
227			// Add the default branch, which is presumed to be last
228			foreach ($this->query('./xsl:otherwise', $node) as $otherwise)
229			{
230			$case = $this->appendElement($switch, 'case');
231			$this->parseChildren($case, $otherwise);
232
233			// There should be only one <xsl:otherwise/> but we'll break anyway
234			break;
235			}
236			}
237
238			/**
239			* Parse an <xsl:comment/> node into the internal representation
240			*
241			* @param DOMElement $ir Node in the internal representation that represents the node's parent
242			* @param DOMElement $node <xsl:comment/> node
243			* @return void
244			*/
245			protected function parseXslComment(DOMElement $ir, DOMElement $node)
246			{
247			$comment = $this->appendElement($ir, 'comment');
248
249			// Parse this branch's content
250			$this->parseChildren($comment, $node);
251			}
252
253			/**
254			* Parse an <xsl:copy-of/> node into the internal representation
255			*
256			* NOTE: only attributes are supported
257			*
258			* @param DOMElement $ir Node in the internal representation that represents the node's parent
259			* @param DOMElement $node <xsl:copy-of/> node
260			* @return void
261			*/
262			protected function parseXslCopyOf(DOMElement $ir, DOMElement $node)
263			{
264			$expr = $node->getAttribute('select');
265
266			// <xsl:copy-of select="@foo"/>
267			if (preg_match('#^@([-\\w]+)$#', $expr, $m))
268			{
269			// Create a switch element in the IR
270			$switch = $this->appendElement($ir, 'switch');
271			$case = $this->appendElement($switch, 'case');
272			$case->setAttribute('test', $expr);
273
274			// Append an attribute element
275			$attribute = $this->appendElement($case, 'attribute');
276			$attribute->setAttribute('name', $m[1]);
277
278			// Set the attribute's content, which is simply the copied attribute's value
279			$this->appendOutput($attribute, 'xpath', $expr);
280
281			return;
282			}
283
284			// <xsl:copy-of select="@*"/>
285			if ($expr === '@*')
286			{
287			$this->appendElement($ir, 'copyOfAttributes');
288
289			return;
290			}
291
292			throw new RuntimeException("Unsupported <xsl:copy-of/> expression '" . $expr . "'");
293			}
294
295			/**
296			* Parse an <xsl:element/> node into the internal representation
297			*
298			* @param DOMElement $ir Node in the internal representation that represents the node's parent
299			* @param DOMElement $node <xsl:element/> node
300			* @return void
301			*/
302			protected function parseXslElement(DOMElement $ir, DOMElement $node)
303			{
304			$elName = $node->getAttribute('name');
305
306			if ($elName !== '')
307			{
308			$element = $this->appendElement($ir, 'element');
309
310			// Copy this element's name
311			$element->setAttribute('name', $elName);
312
313			// Parse this element's content
314			$this->parseChildren($element, $node);
315			}
316			}
317
318			/**
319			* Parse an <xsl:if/> node into the internal representation
320			*
321			* @param DOMElement $ir Node in the internal representation that represents the node's parent
322			* @param DOMElement $node <xsl:if/> node
323			* @return void
324			*/
325			protected function parseXslIf(DOMElement $ir, DOMElement $node)
326			{
327			// An <xsl:if/> is represented by a <switch/> with only one <case/>
328			$switch = $this->appendElement($ir, 'switch');
329			$case = $this->appendElement($switch, 'case');
330			$case->setAttribute('test', $node->getAttribute('test'));
331
332			// Parse this branch's content
333			$this->parseChildren($case, $node);
334			}
335
336			/**
337			* Parse an <xsl:text/> node into the internal representation
338			*
339			* @param DOMElement $ir Node in the internal representation that represents the node's parent
340			* @param DOMElement $node <xsl:text/> node
341			* @return void
342			*/
343			protected function parseXslText(DOMElement $ir, DOMElement $node)
344			{
345			$this->appendOutput($ir, 'literal', $node->textContent);
346			if ($node->getAttribute('disable-output-escaping') === 'yes')
347			{
348			$ir->lastChild->setAttribute('disable-output-escaping', 'yes');
349			}
350			}
351
352			/**
353			* Parse an <xsl:value-of/> node into the internal representation
354			*
355			* @param DOMElement $ir Node in the internal representation that represents the node's parent
356			* @param DOMElement $node <xsl:value-of/> node
357			* @return void
358			*/
359			protected function parseXslValueOf(DOMElement $ir, DOMElement $node)
360			{
361			$this->appendOutput($ir, 'xpath', $node->getAttribute('select'));
362			if ($node->getAttribute('disable-output-escaping') === 'yes')
363			{
364			$ir->lastChild->setAttribute('disable-output-escaping', 'yes');
365			}
366			}
367			}

s9e / TextFormatter

Branch — TemplateParserRefactor (06d644)

Parser::parseXslCopyOf() B

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